49* 



Zoology, 



position, in a jar of water such as is found in ponds where tadpoles abound j 

 and change it often, till the tadpoles have finished their work; which, if two 

 or three tadpoles are allowed to work on a fish of a small size, they 

 will complete in twenty-four hours. I always select the smallest sort of 

 tadpoles, as they can insinuate themselves between the smallest bones, 

 without destroying their articulation." (T. Bluett y in Philosophical Maga- 

 zine y vol. vii. p. 151.) 



Hermaphrodite Insects. — Sir, Perceiving at p. 150. the figure of a her- 

 maphrodite specimen of jBombyx castrensis, forwarded to you from Switzer- 

 land by M. Duval, I have considered that the accompanying figures, repre- 

 senting several other equally and even more extraordinary individuals may 

 be deemed worthy of a place in your Magazine ; especially since they are all 

 representations of British species. The figures are from an extremely rare 

 quarto tract, published by the celebrated Professor Klug of Berlin, and of 

 which not more than a single copy, now in the possession of the Rev. 

 F. W. Hope, has, to the best of my knowledge, found its way to England. 

 From the interest of the figures, I thought it worth while to make a copy 

 of them for my own use ; from which copy my ingenious friend, Mr. Ingall, 

 has since engraved the plate (not intended for publication) of which I now 

 forward you an impression. 



Fig. 88. represents the 

 very rare moth J56mbyx 

 (Eutricha Steph.) pini ; 

 and by drawing a line down 

 the centre of the body, it 

 will be perceived that the 

 left side of the insect pos- 

 sesses the characters of the 

 male, with feathered an- 

 tennae, short wings, and 

 abdomen ; whilst the oppo- 

 site side exhibits the con- 

 trary characters of the fe- 

 male. 



Fig. 89. is a much more 

 singular specimen of B6m- 

 byx (Clisiocdmpa Curt.) castrensis (which is also rare as British) than 



M. Duval's; the wings on the right side 

 being those of a male, whilst the antennae 

 and abdomen of the left side are of that 

 sex ; and the left wing, right antennae, and 

 the right side of the abdomen are those of 

 a female. 

 Fig. 90. represents the -Bombyx (Hypo- 

 gymna Huhn.), with the antennae of the male, but the ground of the wings 



"^ is white, as in the female, with light 

 waves. This I should be inclined 

 to regard merely as a very pale 

 variety of the male. 



Fig. 91. exhibits a hermaphrodite, 

 and at the same time distorted, 

 specimen of the stag beetle (Zuca- 

 nus Cervus L.)-, the left side of the 

 ^^^ specimen being masculine, with the 



jaw twisted, and The right side feminine. It is, however, to be observed, 

 that the elytrum on the left side is larger than that on the right ; whence it 

 would follow (if the general rule of female insects being larger than their 

 male companions be here preserved) that the specimen is quartered like 



